Question

Which of the following is true of an abstract class in Java?

-None of these answers
-An abstract class can be used as the superclass in polymorphic code.
-An abstract class is used to instantiate abstract objects.
--An abstract class can only define abstract methods and cannot implement methods.
-An abstract class cannot be extended.

Answer 1

An abstract class in Java can be used as the superclass in polymorphic code, allowing subclasses to inherit and override its abstract methods.

Step-by-step explanation:

An abstract class in Java is used as a blueprint for other classes. It can contain both abstract methods (methods without implementation) and concrete methods (methods with implementation). Abstract classes cannot be instantiated or used to create objects, but they can be used as the superclass in polymorphic code, where a subclass can inherit and override the abstract methods.